Uranium nitride-silicide advanced nuclear fuel: Higher efficiency and greater safety
Uranium nitride-silicide advanced nuclear fuel: Higher efficiency and greater safety
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DOI：
10.1080/17436753.2018.1521607
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发表时间：
2018-10
影响因子：
2.2
通讯作者：
T. L. Wilson;E. Moore;Denise Adorno Lopes;V. Kocevski;E. Sooby Wood;J. White;A. Nelson;J. Mcmurray;Simon C. Middleburg;P. Xu;T. Besmann
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文献类型：
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作者：
T. L. Wilson;E. Moore;Denise Adorno Lopes;V. Kocevski;E. Sooby Wood;J. White;A. Nelson;J. Mcmurray;Simon C. Middleburg;P. Xu;T. Besmann
作为轻水反应堆事故容忍燃料计划的一部分，硅化铀和硅化物-氮化物被认为是可以与更坚固的包壳（如铁素体（FeCrAl）合金）结合的燃料。虽然这些材料已经在过去进行了研究，但这些系统的基本行为仍然存在不确定性。在这项研究中，四个之间的U3 Si 5和USi 2的组合物通过电弧熔炼制备。此外，为了理解UN-U3 Si 2燃料系统，在Ar中存在不同浓度的N2的情况下，在通过电弧熔化U3 Si 2制造的样品中观察到未识别的U-Si-N三元。制备研究这些系统的组合物的分析包括使用X射线衍射的结构表征和使用扫描电子显微镜与能量色散光谱法的组成分析。通过CALPHAD（相位图计算）方法的吉布斯自由能参数的初始值已被开发的U3 Si 2-FeCrAl相互作用后观察到的三元相。
As part of Accident Tolerant Fuel initiative for light water reactors, uranium silicide and silicide-nitride are being considered as fuels that can be combined with a more robust cladding such as a ferritic (FeCrAl) alloy. Although these materials have been studied in the past, uncertainties remain concerning the fundamental behaviour of these systems. In this study, four compositions between U3Si5 and USi2 were fabricated by arc-melting. Additionally, in an effort to understand the UN–U3Si2 fuel system, an unidentified U–Si–N ternary was observed in samples fabricated by arc-melting U3Si2 in the presence of varied concentrations of N2 in Ar. The analyses of compositions prepared to investigate these systems include structural characterisation using X-ray diffraction and compositional analysis employing scanning electron microscopy with energy dispersive spectrometry. Initial values of the Gibbs energy parameters via the CALPHAD (CALculation of PHAse Diagrams) method have been developed for the ternary phases observed upon U3Si2–FeCrAl interactions.